It is a Digital Voltmeter/Digital Tester/Panel Meter, Measuring Voltage Range: DC 3.3V~30V (Can Measure Power Supply 3.3~30V Directly), It has small size, high efficiency, long term stable and reliable quality,easy installation and use. Application: industrial equipments,electronic equipment, Power distribution box, distribution cabinet, regulators, teaching aids, household small distribution box, Storage Battery Car,Motorcycle, Car, E-bike, ATV, Scooter, and All kinds Voltage Measuring.platforms.